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Redokop E, Poelman H, Filez M, Ramachandran RK, Dendooven J, Detavernier C, Marin GB, Olsbye U, Galvita V. Aligning time-resolved kinetics (TAP) and surface spectroscopy (AP-XPS) for a more comprehensive understanding of ALD-derived 2D and 3D model catalysts. Faraday Discuss 2022; 236:485-509. [DOI: 10.1039/d1fd00120e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spectro-kinetic characterization of complex catalytic materials, i.e. relating the observed reaction kinetics to spectroscopic descriptors of the catalyst state, presents a fundamental challenge with a potentially significant impact on various...
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Chen S, Abdel-Mageed AM, Mochizuki C, Ishida T, Murayama T, Rabeah J, Parlinska-Wojtan M, Brückner A, Behm RJ. Controlling the O-Vacancy Formation and Performance of Au/ZnO Catalysts in CO 2 Reduction to Methanol by the ZnO Particle Size. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01415] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shilong Chen
- Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany
| | - Ali M. Abdel-Mageed
- Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany
| | - Chihiro Mochizuki
- Research Center for Gold Chemistry, Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 192-0397 Tokyo, Japan
| | - Tamao Ishida
- Research Center for Gold Chemistry, Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 192-0397 Tokyo, Japan
| | - Toru Murayama
- Research Center for Gold Chemistry, Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 192-0397 Tokyo, Japan
| | - Jabor Rabeah
- Leibniz Institute for Catalysis (LIKAT Rostock), D-18059 Rostock, Germany
| | | | - Angelika Brückner
- Leibniz Institute for Catalysis (LIKAT Rostock), D-18059 Rostock, Germany
| | - R. Jürgen Behm
- Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany
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Abdel-Mageed AM, Chen S, Fauth C, Häring T, Bansmann J. Fundamental Aspects of Ceria Supported Au Catalysts Probed by In Situ/Operando Spectroscopy and TAP Reactor Studies. Chemphyschem 2021; 22:1302-1315. [PMID: 33908151 PMCID: PMC8362095 DOI: 10.1002/cphc.202100027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/17/2021] [Indexed: 11/30/2022]
Abstract
The discovery of the activity of dispersed gold nanoparticles three decades ago paved the way for a new era in catalysis. The unusual behavior of these catalysts sparked many questions about their working mechanism. In particular, Au/CeO2 proved to be an efficient catalyst in several reactions such as CO oxidation, water gas shift, and CO2 reduction. Here, by employing findings from operando X‐ray absorption spectroscopy at the near and extended Au and Ce LIII energy edges, we focus on the fundamental aspects of highly active Au/CeO2 catalysts, mainly in the CO oxidation for understanding their complex structure‐reactivity relationship. These results were combined with findings from in situ diffuse reflectance FTIR and Raman spectroscopy, highlighting the changes of adlayer and ceria defects. For a comprehensive understanding, the spectroscopic findings will be supplemented by results of the dynamics of O2 activation obtained from Temporal Analysis of Products (TAP). Merging these results illuminates the complex relationship among the oxidation state, size of the Au nanoparticles, the redox properties of CeO2 support, and the dynamics of O2 activation.
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Affiliation(s)
- Ali M Abdel-Mageed
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany.,Department of Chemistry, Faculty of Science, Cairo University, 12613, Giza, Egypt
| | - Shilong Chen
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany.,Institute of Inorganic Chemistry, Kiel University, Max-Eyth-Str. 2, 24118, Kiel, Germany
| | - Corinna Fauth
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany
| | - Thomas Häring
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany
| | - Joachim Bansmann
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, 89081, Ulm, Germany
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Zhu J, Su Y, Chai J, Muravev V, Kosinov N, Hensen EJM. Mechanism and Nature of Active Sites for Methanol Synthesis from CO/CO2 on Cu/CeO2. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02909] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jiadong Zhu
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
| | - Yaqiong Su
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
| | - Jiachun Chai
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
| | - Valery Muravev
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
| | - Nikolay Kosinov
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600, The Netherlands
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6
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Braglia L, Fracchia M, Ghigna P, Minguzzi A, Meroni D, Edla R, Vandichel M, Ahlberg E, Cerrato G, Torelli P. Understanding Solid-Gas Reaction Mechanisms by Operando Soft X-Ray Absorption Spectroscopy at Ambient Pressure. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2020; 124:14202-14212. [PMID: 33815647 PMCID: PMC8008446 DOI: 10.1021/acs.jpcc.0c02546] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/07/2020] [Indexed: 06/12/2023]
Abstract
Ambient-pressure operando soft X-ray absorption spectroscopy (soft-XAS) was applied to study the reactivity of hydroxylated SnO2 nanoparticles toward reducing gases. H2 was first used as a test case, showing that the gas phase and surface states can be simultaneously probed: Soft-XAS at the O K-edge gains sensitivity toward the gas phase, while at the Sn M4,5-edges, tin surface states are explicitly probed. Results obtained by flowing hydrocarbons (CH4 and CH3CHCH2) unequivocally show that these gases react with surface hydroxyl groups to produce water without producing carbon oxides and release electrons that localize on Sn to eventually form SnO. The partially reduced SnO2 - x layer at the surface of SnO2 is readily reoxidized to SnO2 by treating the sample with O2 at mild temperatures (>200 °C), revealing the nature of "electron sponge" of tin oxide. The experiments, combined with DFT calculations, allowed devising of a mechanism for dissociative hydrocarbon adsorption on SnO2, involving direct reduction of Sn sites at the surface via cleavage of C-H bonds and the formation of methoxy- and/or methyl-tin species at the surface.
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Affiliation(s)
- Luca Braglia
- CNR-
Istituto Officina dei Materiali, TASC, 34149 Trieste, Italia
| | - Martina Fracchia
- Dipartimento
di Chimica, Università di Pavia, V.le Taramelli 13, I-27100 Pavia, Italy
| | - Paolo Ghigna
- Dipartimento
di Chimica, Università di Pavia, V.le Taramelli 13, I-27100 Pavia, Italy
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
| | - Alessandro Minguzzi
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milan, Italy
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
| | - Daniela Meroni
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, 20133 Milan, Italy
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
| | - Raju Edla
- CNR-
Istituto Officina dei Materiali, TASC, 34149 Trieste, Italia
| | - Matthias Vandichel
- Department
of Chemical Sciences and Bernal Institute, Limerick University, V94
T9PX Limerick, Ireland
| | - Elisabet Ahlberg
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Kemigården 4, SE-412 96 Gothenburg, Sweden
| | - Giuseppina Cerrato
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, 50121 Firenze, Italy
- Department
of Chemistry and NIST Interdipartimental Center, Università degli Studi di Torino, via P. Giuria, 7, 10125 Torino Italy
| | - Piero Torelli
- CNR-
Istituto Officina dei Materiali, TASC, 34149 Trieste, Italia
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7
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Fracchia M, Ghigna P, Pozzi T, Anselmi Tamburini U, Colombo V, Braglia L, Torelli P. Stabilization by Configurational Entropy of the Cu(II) Active Site during CO Oxidation on Mg 0.2Co 0.2Ni 0.2Cu 0.2Zn 0.2O. J Phys Chem Lett 2020; 11:3589-3593. [PMID: 32309955 PMCID: PMC8007101 DOI: 10.1021/acs.jpclett.0c00602] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/20/2020] [Indexed: 05/28/2023]
Abstract
The mechanisms of CO oxidation on the Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O high-entropy oxide were studied by means of operando soft X-ray absorption spectroscopy. We found that Cu is the active metal and that Cu(II) can be rapidly reduced to Cu(I) by CO when the temperature is higher than 130 °C. Co and Ni do not have any role in this respect. The Cu(II) oxidation state can be easily but slowly recovered by treatment of the sample with O2 at ca. 250 °C. However, it should be noted that CuO is readily and irreversibly reduced to Cu(I) when it is treated with CO at T > 100 °C. Thus, the main conclusion of this work is that the high configurational entropy of Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O stabilizes the rock-salt structure and permits the oxidation/reduction of Cu to be reversible, thus permitting the catalytic cycle to take place.
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Affiliation(s)
- Martina Fracchia
- Dipartimento
di Chimica, Università di Pavia, V. le Taramelli 13, I-27100, Pavia, Italy
| | - Paolo Ghigna
- Dipartimento
di Chimica, Università di Pavia, V. le Taramelli 13, I-27100, Pavia, Italy
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, I-50121 Firenze, Italy
| | - Tommaso Pozzi
- Dipartimento
di Chimica, Università di Pavia, V. le Taramelli 13, I-27100, Pavia, Italy
| | - Umberto Anselmi Tamburini
- Dipartimento
di Chimica, Università di Pavia, V. le Taramelli 13, I-27100, Pavia, Italy
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, I-50121 Firenze, Italy
| | - Valentina Colombo
- INSTM,
Consorzio Interuniversitario per la Scienza e Tecnologia dei Materiali, Via Giusti 9, I-50121 Firenze, Italy
- Dipartimento
di Chimica, Università degli Studi
di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Luca Braglia
- CNR
- Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
| | - Piero Torelli
- CNR
- Istituto Officina dei Materiali, TASC, I-34149 Trieste, Italy
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Rezvani A, Abdel-Mageed AM, Ishida T, Murayama T, Parlinska-Wojtan M, Behm RJ. CO2 Reduction to Methanol on Au/CeO2 Catalysts: Mechanistic Insights from Activation/Deactivation and SSITKA Measurements. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04655] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Azita Rezvani
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
| | - Ali M. Abdel-Mageed
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
| | - Tamao Ishida
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Toru Murayama
- Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | | | - R. Jürgen Behm
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
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9
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Abdel-Mageed AM, Klyushin A, Knop-Gericke A, Schlögl R, Behm RJ. Influence of CO on the Activation, O-Vacancy Formation, and Performance of Au/ZnO Catalysts in CO 2 Hydrogenation to Methanol. J Phys Chem Lett 2019; 10:3645-3653. [PMID: 31192610 DOI: 10.1021/acs.jpclett.9b00925] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The impact of CO on the activation and reaction characteristics of Au/ZnO catalysts in methanol synthesis from a CO2/H2 mixture was studied by kinetic, near ambient pressure X-ray photoelectron spectroscopy and X-ray absorption spectroscopy at the O K-edge, together with in situ Foureir transform infrared measurements. Transient measurements under up to industrial reaction conditions (50 bar, 240 °C) show a pronounced transient increase of the activity for methanol formation from CO2/H2 after exposure to a CO/H2 reaction gas mixture, while the steady-state activity is similar to that observed directly after oxidative pretreatment. For the reaction in CO/H2, the much longer activation phase is accompanied by formation of CO2 due to reaction of CO with the ZnO catalyst support. This leads to O-vacancy formation on the support at an extent significantly higher than in CO2/H2. The consequences of these findings on the mechanistic understanding of methanol formation from CO2/H2 on Au/ZnO and for ZnO-supported catalysts in general are discussed.
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Affiliation(s)
- Ali M Abdel-Mageed
- Institute of Surface Chemistry and Catalysis , Ulm University , Albert-Einstein-Allee 47 , D-89081 Ulm , Germany
| | - Alexander Klyushin
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany
- Max Planck Institute for Chemical Energy Conversion, Heterogeneous Reactions , Stiftstrasse 34-36 , D-45470 Mülheim , Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie, BESSY II , Albert-Einstein-Straße 15 , D-12489 Berlin , Germany
| | - Axel Knop-Gericke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany
- Max Planck Institute for Chemical Energy Conversion, Heterogeneous Reactions , Stiftstrasse 34-36 , D-45470 Mülheim , Germany
| | - Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft , Faradayweg 4-6 , D-14195 Berlin , Germany
- Max Planck Institute for Chemical Energy Conversion, Heterogeneous Reactions , Stiftstrasse 34-36 , D-45470 Mülheim , Germany
| | - R Jürgen Behm
- Institute of Surface Chemistry and Catalysis , Ulm University , Albert-Einstein-Allee 47 , D-89081 Ulm , Germany
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